How do I write a translatable dialogue line in Project Fluent that varies by count, gender or grammatical case?

In Project Fluent a translatable line varies by count, gender or case through select expressions with a required default variant (*): numbers match exact keys or plural categories, formatting options can change the category, parameterised terms select grammatical case, and term attributes like .gender drive agreement. Curator qualifications: Documentation read 2026-10-22; no code compiled or run; no saves synced. Runtime behaviour for missing variables not documented in the spec file read (producer note kept). Limitations: Documentation read 2026-10-22; no code compiled or run; no saves synced. Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

{
  "citations": [
    {
      "url": "https://projectfluent.org/fluent/guide/selectors.html",
      "note": "Fluent guide, Selectors (bytes equal producer pin); Fluent guide, Terms (bytes equal pin)"
    },
    {
      "url": "https://projectfluent.org/fluent/guide/terms.html",
      "note": "Fluent guide, Selectors (bytes equal producer pin); Fluent guide, Terms (bytes equal pin)"
    },
    {
      "url": "https://raw.githubusercontent.com/projectfluent/fluent/ce153b3ea44f1729d3ebb001b97758ebd269ef19/spec/errors.md",
      "note": "Fluent guide, Selectors (bytes equal producer pin); Fluent guide, Terms (bytes equal pin)"
    }
  ]
}